Affiliation: | aDepartment of Radiology, University of Colorado at Denver Health Sciences Center, Denver, Colo.;bDepartment of Medical Physics, University of Crete, Heraklion, Greece.;cDepartment of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, Calif.;dRussell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, Md. |